Conventional semiconductor-based digital electronics, with complementary metal oxide
semiconductor (CMOS) technology as the primary example, has experienced meteoric …

Single-flux quantum logic (SFQ) circuits, in which a flux quantum is used as an information
carrier, have the possibility for opening the door to a new digital system operated at over 100 …

Superconducting quantum electronics is formally born in 1911, three years after Heike
Kamerlingh Onnes was able to liquefy helium at the University of Leiden in the Netherlands …

The Flux-1 chip is an RSFQ implementation of a small general-purpose processing engine
with target clock frequency of 20 GHz and over 5000 gates (over 60 K Josephson junctions) …

Superconducting logic is fast and energy efficient relative to CMOS but also fundamental
studies are needed to scale up circuits for greater utility. Recently, ballistic shift registers for …

The bias current requirement for RSFQ circuits is about an ampere per thousand gates. High
current increases the thermal load of cables into the cryostat, produces undesirable currents …

First-in, first-out (FIFO) buffers load and unload data using separate clocks that may be
incoherent. We explore the application of FIFOs to circular shift registers, serial memory, and …

With Moore's law approaching its physical limits, low-temperature computing technology is
ushering in unprecedented development opportunities. Rapid single-flux-quantum (RSFQ) …

We recently reported communication up to 60 Gb/s between digital superconductor chips
mounted on a passive carrier, using a novel driver circuit that produces a double-flux …

Ultra-high speed microprocessors, clocked at hundreds of Gigahertz, remain the dreams of
processor designers and consumers alike. However, such processors would require …